Interface science is the study of physical phenomena of surface interactions between gas, liquid and solid matter, including wettability, solubility, permeability, printing, and coating among others.

KYOWA manufactures and supplies measurement instruments and software used in interface science research.

A contact angle is typically used for the evaluation of wettability and adhesiveness between solid and liquid surfaces. The operation is very simple by depositing a small droplet on a solid surface, and watch the phenomenon from the cross section under atmospheric pressure. It can also present useful data to evaluate solid surface conditions after cleaning or treatment process.

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Surface Tension affects to liquid to be round of itself or to be wetted to others. Typically, one studies the surface tension of a given liquid to determine how these liquid properties behave among others. A droplet keeping spherical shape, bubbling, permeation of liquid into clothes, coating over solid materials, and emulsification; these phenomena are mainly controlled by Surface Tension, and proper adjustment of Surface Tension brings optimized conditions respectively.

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Friction exists wherever two substances contact, and without Friction, the natural actions in daily life that we can stand, sit down, and walk are impossible. Force of Friction should be different when an object is started moving and while it is moving. The former is defined “Static Friction” and the later is “Kinetic Friction”, and generally Static Friction should be larger. Evaluation of Friction helps the studies of lubricity, abrasion, stick-slip phenomenon, and wide varieties of solid surfaces which need the control of slipping and stopping.